Sheet metal nut



sept. 26, 19.,

R. l. SCHONITZER ETAL SHEET METAL NUT Fiie'd oci. 1942 Tu -llllllh`Patented Sept. 26, 1944 2,358,8:rzv

SHEET METAL, NUT

udolph Lschonitzer, Shaker Heights, and Harold B. Muster, AvonLake,Ohio; said Muster assigner to said Schonitzer Application October, 1942,Serial No. 460,928

20 Claims.

This invention relates to improvementsr in sheet metal nuts, theinvention having for its general object the provision -of a strong,sturdy and durable nut capable of being rapidly and rinexpensivelyfabricated from sheet metal by Well-known stamping Yand formingoperations.

A further object of the rpresent invention is the provision of a nutwhich `comprises a pair of simple and inexpensive telescopically relatedsheet metal members, the inner member being internally threaded for thereception of a bolt, bushing .or other externally threaded element andthe outer member having'aV transverse shoulder for contact with theobject to be held or retained and also having means, such as Wrench.-receiving openings, to facilitate turning of the nut in its applicationand removal.

A further object lof the present invention is the provision of a nut inwhich the :two telescopically related sheet metal members thereof are sorconstructed and arranged that said members are more firmly drawntogether as the nut is tightened in use thereof.

A further object of the present invention is the 'provision of a nut inwhich the two telescopically related sheet Vmetal members thereof areeffectively held against relative rotary movement by inter-ttingapertures and projections with which they are provided, theinterlockingof Ysaid members being effected as they are endwiseassembled in telescopic relation.

A further object of the present invention is the provision of a nut inlwhich the internal -threads of the inner sheet metal member areeffectively protected from damage by a wrench applied to the `outersheet metal member for nutturning purposes, the Wrench-receivingopenings being only in the outer sheet metal member.

A further object of the present invention uis the provision of a nuthaving one or more turning pins rigidly secured to the outer sheet metal-to in or will beevident from the following detailed description ofthree embodiments of such `invention,.reference being `Ahad to theaccom- .panying drawing, in which Fig. 1 is a top plan View of one formof sheet metal nut embodying the present invention, a portion of thetopflange of the in ner sheet metal member of the n ut being broken avvayto showV the manner in which the turning pins are secured to the outersheet metal member -of the nut; o I Fig. 2 is a side view, partly insection and partly in elevation, of said nut,r the, view being on theline 2,-2, Fig. 1;

Fig. 3 is a perspective view of the inner sheet metal member of the nutof Figs. 1 and `2;

Fig. 4 is a similar view vof .the outersheet metal Amember ,of lsaidnut;

Fig. 5 is a detail vertical sectional view of the nut of Figs. 1 and 2,as viewed lfrom the line 'V5- 5, Fig. 1;

Fig. 6 is la fragmentary top plan view of a .slightly modified for-rnAof sheet metal nut em ,bodyine the -present'inventom 7 is a side view,partly in section and partly in elevation, Aof the nut o f Fig. 6, theView being on the line 1 -1, Fig. l6; o

Fig. 8 is a fragmentary top plan view of lan.- other modied form ofsheetmetal nut embodying the present invention;

Fig. 9 is a side view, partly in section and partly in elevation, of thenut of Fig. 8, the view being on the line `9 4), Fig. 8; and

Fig. 10 is a side viewshowing the lnut of Figs. 1 to 5 inclusive as'used Afor the retention of a ,bomb 1in, vthe xbomb and its :iin beingfragmentarily shown.

Before the sheet metal .nuts here illustrated are specically described,it is to be understood that the invention here involved is not limitedto l*the Adetails Aof,.construction orothe speciiic arrangement of partsherein illustrated or described, Vas vthe invention obviously may takeother forms. It also lis to .be Aunderstood that the phraseology orterminology herein vemployed Vis for the purpose of description and notof limitation, the .scope Lof ,the presentA invention being indicatedbythe appended claims.

Referring rst to that'form of nut illustrated `in Figs. lto 5 inclusive,it willbe noted that such nut comprisesya lpair .of AtelasGorifflllyrelated r sheetmetal members .lll Vand I l capable of being .rapidly andinexpensivelymade by simple stampe Ning and forming operations. .Thevinner nut member I0, illustrated `per se in Fig. 3, consists of acylindricalwall I2 andan outwardly turned annular top flange l3thecylindrical `wall l2 being internally threaded (as at i4) throughoutitslength, as bestshown in Fig. 2,. The outer nut member Il, illustratedper ,se in-Fig. u4, consists of a lower cylindrical wall I5, an uppercylindrical wall I6 and a transverse annular shoulder I'I therebetween,the diameter of the upper wall I6 being greater than that of the lowerwall I5 by the width of the intermediate shoulder I1.

For nut-forming purposes, the two sheet metal members IIJ and II areassembled in telescopic relationship by relative endwisemovementthereof, an assembly which can be easily, quickly and convenientlyeffected. The relative diameters of the internally threaded cylindricalwall I2 of the inner member Il] and the cylindrical lower wall I5 of theouter member I I are such as to enable said outer wall I5 to snugly fitupon said inner wall I2, the upper and enlarged cylindrical wall I6 ofthe outer member being thus spaced from the wall I2 of the inner member,as clearly shown in Fig. 2. From bothY Figs. 1 and 2, it will be evidentthat the width of the top flange I3 of the inner member IU is such as toenable it to snugly t within the upper cylindrical wall I6 of the outermember I I.

In order to effectively prevent relative rotary movement of members I0and II after their assembly in telescopic relationship, said members aresuitably interlocked, the interlocking of said members beingaccomplished as they are endwise assembled. For the interlocking of suchmembers, the upper cylindrical wall I6 of the outer member II isprovided in its upper edge with a series (six, as here shown) ofcircumferentially spaced notches I9, and the annular top ilange I3 ofthe inner member I is provided in the plane of said flange with alikeseries of correspondingly spaced circumferential projections 2S. As bestshown in Fig. 1, the projections 2D of the inner member I0 snugly fitwithin the notches I9 of the outer member II, the depth of such notchescorresponding with the thickness of said projections (see Fig. 2) sothat the nut flange I3 has a smooth and uninterrupted top surface.Moreover, as the outer ends ofthe projections 20 are flush with theouter surface of the upper cylindrical wall I6 of the outer member Il,said wall surface is likewise smooth and uninterrupted, as will beevident from Fig. 2.

To interlock members I0 and II as they are endwise assembled, it ismerely necessary that the notches I9 and the projections 20 be inregistry, as will be readily understood. When the projections 20 areseated in the notches I9, relative rotary movement of the two members iseffectively prevented, the two members turning as a unit upon theapplication of a turning force to the outer member. Moreover, as the nutis tight-A ened up in use thereof, the reacting force exerted againstthe retaining shoulder I'I will cause the two sheet metal members ofsaid nut to be drawn together with increasing firmness, an importantfeature of the present invention.

In order to enable a turning force to be readily applied to the outermember II of the nut, for the application of said nut to, and itsremoval from a bolt, bushing or other externally threaded element, theupper cylindrical wall I6 of said outer member is provided with a seriesof circumferentially spaced wrench-receiving openings. In `thisembodiment of the invention, said openings are in the form of roundapertures 2I, there being six such apertures as here shown, with anaperture located between (preferably midway between) each two adjacentnotches I9. The location of the wrench-receiving apertures 2I- in theportions of the wall lI6 having the greatest height not only disposessaid apertures below the plane of the top flange I3 of the inner nutmeme ber IIJ but also, enables said apertures to be sulciently spacedfrom the upper and lower edges of wall I6 as to avoid any liability offracture of such wall, adjacent said apertures, in the use of a spannertype wrench in turning the nut, as will be readily understood.

If desired, one or more of the wrench-receiving apertures 2l may havepermanently mounted therein a suitable pin or pins for use in turningthe nut if a wrench is not readily available. As here shown, two suchturning pins 22 are mounted in two diametrically opposed apertures 2|,the reduced inner end portions of said pins extending through suchapertures and the inner ends of such reduced pin portions beinglaterally upset, as at 23 (see Figs. 1 and 5), for the permanentmounting of said pins. As will be evident from Fig, 2, there isinsufficient space between the top flange I3 of the inner nut member I0and the intermediate shoulder II of the outer nut member II forunsetting of the inner ends of the pins toward such nut parts. However,it will be quite evident from Figs. l and 5 that there is ample roomwithin ,the annular cavity 24 within which lie the inner ends of saidpins for the lateral upsetting thereof. The mounting of the pins 22 inthe Wall I6 of the'outer nut member II is effected, of course,before'such member is assembled with the inner nut member I0, theannular cavity 24 providing ample space for the reception of the upsetor headed inner ends of said pins, as clearly evident from Fig. 2.

Referring now to Figs. 6 and 7, wherein is illustrated a slightlymodified form of sheet metal nut embodying the present invention, itwill be noted that such nut differs from the one heretofore describedand illustrated in Figs. 1 to 5 inclusive in the character of itswrench-receiving openings. As best shown in Fig. '7, the wrenchreceivingopenings of the upper cylindrical wall Ilia of the outer sheet metalmember of the nut of Figs. 6 and 7 are in the form of notches 26.-

and are located below the notches I9a with which such wall is providedfor the reception of the circumferential projections 20a of the topflange I3a of the inner nut member. When the two sheet metal members ofthis nut are assembled in telescopic relation, the wrench-receivingnotches 26 of the outer member are covered by the flange projections 20aof the inner member, said projections being shown as somewhat wider thanthe corresponding projections 20 of the nut of Figs. 1 to 5 inclusive.Although the nut of Figs. 6 and 'I is here shown as having no turningpins, it is obvious that pins corresponding to the turning pins 22 ofthe nut of Figs. 1 to 5 inclusive may be mounted in two of thewrench-receiving notches 26 of the nut of Figs. 6 and '7, in the mannerheretofore described.

It will be noted that the side walls of the projection-receiving notchesI9 of the nut of Figs. 1 to 5 inclusive and the projection-receivingnotches I9a of the nut of Figs. 6 and 7 are substantially parallel, asare the sidewalls of the flange projections 20 and 26a whichrespectively seat in such notches for interlocking purposes. Thisenables the formation of such notches to be easilyv and economicallyeffected by the use of piercing dies or equivalent means, as will bereadily understood.

A further diiference between the nut of Figs. 6 and 7 and the nut ofFigs. 1.to 5 inclusive is that the cylindrical lower Wall I5a of theouter member of the nut of Figs. 6 and '7 is provided with an inturnedannular flange 21 which underlies and engages'the lower end of theinternally threaded wall l2a of the inner member of such nut. As clearlyshown in Fig. 7, the width of inward extent of the annular fiange 21 issomewhat less than the thickness of the threadannular flange 21 of theouter nut member with increasing firmness, with a correspondingincreasing degree of contact of the intermediate shoulder 11a of the nutwith the object to be clamped or retained. Y

Referring now to Figs. 8 and' 9, wherein is illustrated another modifiedform of sheet metal nut embodying the present invention, it will benoted that the telescopically related sheet metal members of such nutare not interlocked and hence, have no interfitting notches andprojections as do the nuts heretofore described. In this embodiment ofthe invention, the outer circumferential edge ofthe top flange l3b ofthe inner nut member merely overlies the upper edge of the cylindricalupper wall lSb of the outer'nut member, said outer member wall, like thewall IB of the nut of Figs. 1 to 5 inclusive, being Y provided withcircumferentially spaced wrenchreceiving openings in the form of roundapertures 2lb. To prevent relative turning movement of the two sheetmetalmembers of this nut, when such members are assembled in telescopicrelationship as shown in Figs; 8 and 9, brazing or the like is used, theparts of said'members which are rigidly connected by brazing or the likepreferably being the lower portion of the internally Ythreadedcylindrical wall I2b of the inner member and the lower cylindrical wallb of the outer member.

To enable the nutof Figs. 8 and 9 to be readily turned, if a spannertype wrench is not avail;

able, a pair of turning pins 22h may be, and vhere are, mounted in twovdiametrically opposed Wrench-receiving apertures 2lb. As clearly shownin Figs.V 8 and 9, the pins 22h have reduced inner end portions fittingthe apertures 2lb' through which they extend, and headed inner ends 28which effect the permanent mounting of said pins in said apertures.

Although nuts embodying the present invention have many uses,rFig. 10shows, merely for purposes of illustration, the use of one of thepresent nuts as used for the retention to, a bomb 30 of a bomb fin 3|.The nut of Fig. 10, designated by the reference letter A and embodyingthat form of the invention illustrated in Figs. 1 to 5 inclusive,isthreaded to an externally threaded bushing 32 or the likeprojectin'grearwardly from the rear end of the bomb 30, the inner end ofthe nutbeing spaced from the bomb rear end, as shown. The bombv n`3| hascircumferentially spaced portions 33 engaging the bomb exterior adjacentits rear end, and a centrally apertured disk-like part 34 which overliesthe rear end of the bomb, portions 35 of said disk-like part beingdepresed to engage the rear endof the bomb, as shown. The aperture ofsaid disk-like part 34 is of such size as'to receive the reducedcylindrical lower end of the nut A, with the-intermediate annularshoulder l1 of the nut overlying said disk-like part for thesecure'retention of theA bomb i'ln Y AAs the nut A is tightened on thebomb bushing 32, by the useof a spanner type wrench and the apertures 2|of the nut or by the use of the nutA turning pins 22,"the twointerlocked members of the nut are moved downwardly so as to bring theintermediate annular shoulder I1 of the nut into firm engagement withthe bomb iin disk-'like part 34; The tighter the nut is drawn down ontothe bomb bushing 32, the firmer is the engagement between theinterlocking means of the two nut members, as the resistance or reactionforce set up by the bomb disk-like part 34 against the nut shoulder I1tends to urge the outer member of the nut upwardly, all as will be of,in walls which are spaced from the internally threaded walls of theinner nut members, there is no liability of damage to s uch threads bySpanner type wrenches cooperating withA said openings for nut-turningpurposes. In each embodiment of the invention here illustrated, theouter member of the nut is overlapped at its upper end by portions ofthe inner nut member, and inasmuch as the outer member is normally urgedupwardly with respect to the inner member, by the reacting force exertedby the object being clamped against the annular intermediate shoulder ofthe outer nut member, the nutris more or less of self-locking character.The interlocking means of the nuts of Figs. 1 to 7. in,- clusiveare ofparticularly effective character, and to interlock the two members ofeach of those nuts, it is merely necessary that their complementarynotches and projections be in registry as the members are endwiseassembled in telescopic relationship, as heretofore pointed out. Ifdesired, the inturned annular flange 21 of the y nut of Figs. 6 and 7may be omitted and conversely, either the nut of Figs. 1 to 5 inclusiveor the nut of Figs. 8 and 9 may `be provided, if desired, with such aninturned annular ange, all as will be. readily understood.

To those skilled in the art to which the presouter telescopicallyrelated sheet metal members,y

the inner member having an internally threaded cylindrical wall and anoutwardly turned top flange, the outer member having a lower wallsleeved upon the internally threaded cylindrical wall of the innermember, an outwardly turned intermediate shoulder, and an upper wallhaving portions thereof underlying and in contact with the top ange ofsaid inner member, and means for preventing relative rotary movement ofsaid telescopically related members.

2; A sheet metal nut, comprising inner and outer telescopically relatedsheet metal members, the inner member having an internally threadedcylindrical wall and an outwardly turned top ange, the outer memberhaving a lower cylindrical wall Vsleeved upon the internally threaded lyturned intermediate shoulder of annular form,

4turned in its application and removal.

cylindrical wall of said inner member by the width of saidintermediate'shoulder and having` portions thereof underlying and incontact withthe vtop flange of said inner member, and means forpreventing relative rotaryvmovementV of said telescopically relatedmem'bers.

, 3. A sheet metal nut, comprisingirmerjand outer telescopically relatedsheet 4metal members, the inner member having anV internally threadedtubular portion and an outwardly turned top vilange, the.outenmemberhaving a side wall with an inwardly turned portionengagingtheinternally threaded tubular por-tion Aof the inner member, the sidewallof said outer member being in contactwith the top flange of said innermember, and means for preventing relative rotary movement of saidtelescopically related members, the side wall of said outer member beingprovided withmeans to enable the nut to be readily turned in itsapplicationand removal.

4. A sheet metal nut, comprisingr inner'and outer telescopicallyrelatedsheet metal members,

the inner member having an internally threaded cylindrical wall and anoutwardly turned top flange, the outer member having a lower/CylindricalVwall sleeved upon the internally threaded cylindrical wall of the innermember, anoutwardly turned intermediatefshoulder of annular form, and anupper cylindrical wall spaced from the cylindrical wall of said innermember by the width of said intermediate shoulder and having portionsthereof underlying and in contact with the top flange of said innermember, and means for preventing relative rotary movement of -saidtelescopically related members, the upper cylindrical wall of said outermember being provided with rcircumferentially spacedl wrench-receivingopenings to enable the nut to'be'readily 5. A sheet metal nut,vcomprising inner and outer telescopically `related, sheet metalmembers,

vthe inner member having an internally threaded cylindrical wall and anoutwardly turned upper flange, the outer member having-a lowerwallsleeved upon the internally'threaded.cylindrical wall of the innermember, an outwardly turned intermediate shoulder, and an upper wallhaving Ynotches for the reception ofprojections with which the topilange of said inner member is provided, whereby relative rotarymovement of said telescopically related members is prevented.

6. A sheet metal nut, comprising inner and outer telescopically relatedsheet metal mem` bers, the inner memberv having an internally threadedtubular portion and an outwardly turned upper flange, the outer memberhaving a side wall with an inwardly turned portion engaging theinternally threaded tubular portion of the inner member, the side wallof said outer member being provided with notches for the reception ofprojections with which the upper ange of said inner member is provided,lwhereby relative rotary movement of said telescopically related membersis prevented.

7. A sheet metal nut, comprising inner and outer telescopically relatedsheet metal members, the inner member having an internally threadedcylindrical wall and an outwardly turned'top flange, the outer memberhaving a lower wall sleeved. upon the internally threaded cylindricalwall of the inner member, an outwardly turned intermediate shoulder, andan upper wall having circumferentially spaced notches to receivecorreupper wall of said outer member being-provided yand an uppercylindrical wall spaced 4from v the `spending-ly'spaced projections ofthe 'top flange .ofL-.the inner member as the inner and -outer membersare telescopically related, whereby relative rotary movement of saidtelescopically related `members is prevented.

8. A sheet metal nut, comprising inner-and outer telescopically relatedAsheet metal members,

.the inner mern'ber having an internally threaded cylindrical wall andan. outwardly turned top flange, the outer member having aY lowerfwallsleeved upon the internally threaded cylindrical wall ofthe innermember, an outwardly turned intermediate shoulder, and an upper wallhaving circumferentially spaced notchesv for the receptionjofprojections with which the top langeof the-inner member is provided inltheplane of such flange, whereby relative rotarymovement of saidtelescopically related members isV prevented.

9. A sheet metal nut, comprising inner and outer telescopically relatedsheet metal members, the inner member having an internally threadedcylindrical wall and an 'outwardly turnedtop flange,.the outer memberhaving a lower wall s1eeved;upon the internally threaded cylindrical'.wall of the inner member, an outwardly turned outer telescopicallyrelated sheet metal members,

the inner member having an internally threaded cylindrical wall and anoutwardly turned top flange, the outer member having a lower wall Ysleeved upon the internally threaded cylindrical wall of the innermember, an outwardly turned intermediate shoulder, and an uppercylindrical :wall having notches in its upper edge portion for lthereception of projections with which the top flange of said inner memberis provided,'whereby relative rotary movement of said telescopicallyrelated members is prevented, the upper1 wallof `said outer member beingalso provided below at least two of said projection-receiving notcheswith wrench-receiving notches to enable the nut to be readily turned initsl applicationv and removal, the wrench-receiving notches being closedat the top by the projections of the'top flange of the inner member; Y'

l1. A sheet metal nut, comprising inner and outer telescopically relatedsheet metal members, the inner member having an internally threadedcylindrical wall and an outwardly turned top Vflange, the 4outer vmemberhaving a lower wall sleeved upon the internally threaded cylindricalwall of the inner member, an outwardly turned intermediate shoulder,Iand an upper cylindrical wall having portions 4thereof underlying andin contact with the top flange of said inner member, means forpreventingrelative rotary movement of said telescopically relatedmembers, the

with circumferentially spaced wrench-receiving wrench, and a turning pinpermanently mounted in one of said openings to enable the turned if 'awrench is not available,` i Y -12. A sheet metal nut, comprisinginnerfand outer'telescopically related sheet metal-mernber`s, the vinnermember having anv internally threaded cylindrical wall andan outwardlyturnedv top flange, the outer member` havingalower wall sleeved upontheY internally threaded cylindrical wall of the inner member, anoutwardly turned intermediate shoulder, and an upper wall spaced fromthe cylindrical wall of the inner member and having portions thereofunderlying and in contact with the top flange of said inner mem-y ber,means for preventing relative rotary movement of said telescopicallyrelated members, the

' upper wall of said outer member having two circumferentially spacedopenings, and a turning pin permanently mounted in each of said openingsto enable the nut to be readily turned in its application and removal,said pins having headed inner ends lying within the space pro` wall ofthe inner member, an outwardly turnedA intermediate shoulder, and anupper wall having circumferentially spaced notches diametrically opposedin pairs and the top flange of said inner member having correspondingprojections seated within and fitting said notches, whereby relativerotary movement of said telescopically related members is prevented.

14. A sheet metal nut, comprising inner and outer telescopically relatedsheet metal members, the inner member having an internally threadedcylindrical wall and an outwardly turned, top ange, the outer memberhaving a lower wall sleeved `upon the internally threaded cylindricalwall ofthe inner member, an outwardly turned intermediate shoulder, andan upper wall having circumferentially spaced notches diametricallyopposed in pairs and the top ange of said inner member havingcorresponding projections seated within and fitting said notches,whereby relative rotary movement of said telescopically related membersis prevented, the side walls of each of said notches and the side edgesof the projection seated within and tting the same being generallyparallel.

15. A sheet metal nut, comprising inner and outer telescopically relatedsheet metal members, the inner member having an internally threadedcylindrical wall and an outwardly turned top flange, the outer memberhaving a lower wall sleeved upon the internally threaded cylindricalWall of the inner member, an outwardly turned intermediate shoulder, andan upper wall having circumierentially spaced notches for the receptionof projections with which the top ange of said inner member is provided,whereby relative rotary movement of said telescopically related membersis prevented, the upper wall of said outer member also being providedwith circumferentially spaced wrench-receiving apertures to enable thenut to be readily turned in its application and removal, the notches andthe apertures of the upper Wall of vsaid outer member being alternatelyspaced.

16. A sheet metal nut, comprising inner and outer telescopically:related sheet metal mem'- bers', the innerl member having an internallythreaded cylindrical wall and anl outwardly turned `top ange, the outermember havingy a lower wall sleeved upon the internally threadedcylindrical wall of the inner memberyan outwardly turned intermediateshoulder, and an upper vWall spaced from the cylindrical wall of `saidinner -member and having portions' thereof un-y derlying 'and in contactwith the top flange of said inner member, means for preventing relativerotary movement of Said telescopically related members, the upper vwalllof said outer member having a pair of circumferentially spacedopenings, a turning pin mounted in each of said openings to enable thenut to be readily turned in its application and removal, the inner endportion of each of said pins lying in the space between walls of theinner and outer members and en-v gaging the top ilange of the innermember and the intermediate shoulder of the outer member, andcircumferentially extending means carried by the inner end of each ofsaid pins for permanently anchoring said pin inA its opening.

17. A sheet metal nut, comprising inner and outer telescopically relatedsheet metal members, the inner member having an internally threadedcylindrical wall and an outwardly turned top ange, the outer memberhaving a lower wall sleeved upon the internally threaded cylindricalwall of the inner member, an outwardly turned intermediate shoulder, andan upper Wall spaced from the cylindrical wall of said inner member andhaving portions thereof underlying and in contact with the top flange ofsaid inner member, means for preventing relative rotary movement of saidtelescopically Vrelated members, the upper wall of said outer memberhaving a pair of circumferentially spaced openings, a turning pinmounted in each of said openings to enable the'nut to be readily turnedin its application and removal, the inner end portion of each of saidpins lying in the space between walls of the inner and outer members andengaging the top flange of the inner member and the intermediateshoulder of the outer member, the inner end of each of said pins beinglaterally upset to effect its permanent securement in its opening.

18. A sheet metal nut, comprising inner and outer telescopically relatedsheet metal members, the inner member having an internally threadedcylindrical wall and an outwardly turned top ange, the outer memberhaving a lower wall sleeved upon the internally threaded cylindricalwall of the Ainner member, an outwardly turned intermediate shoulder,and an upper wall having portions thereof underlying X and in contactwith the top ange of said inner member, the lower wall of said outermember having an internal flange underlying and engaging the lower endof the internally threaded wall of said inner member, and means forpreventing relative rotary movement of said telescopically relatedmembers.

19. A sheet metal nut, comprising inner and outer sheet metal members,the inner member having an internally threaded tubular portion and anoutwardly turned portion, the outer member having a tubular portionsurrounding the tubular portion of said inner member and also having anoutwardly turned portion disposed below the outwardly turned portion ofsaid inner member, the outwardly turned portion of one of said membershaving a peripheral notch and the outwardly turned portion of the othermember having a projection extending into said notchV to therebyinterlock said members from relative' rotary movement.

20. A sheet metal nut, comprising inner and,

low theoutwardly turned portion of said inner: member, the outwardlyturned portion of one of said vmembers-having an aperture and theoutwardlyturned-portionof the other member having a projection extendinginto said aperture to thereby interlock said members from relativerotary movement. Y RUDOLPH I. SCHONITZER. HAROLD B. MUSTER.

having an outwardly turned portion disposed be- 10 f

